UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Product revenue	$ 240,846	$ 226,421	$ 720,913	$ 667,601
Service revenue	6,378	5,037	17,565	15,309
Total revenue	247,224	231,458	738,478	682,910
Cost of product revenue	176,148	162,125	526,858	475,523
Cost of service revenue	7,933	8,567	23,397	25,528
Total cost of revenue	184,081	170,692	550,255	501,051
Gross profit	63,143	60,766	188,223	181,859
Selling, general and administrative expenses	53,601	56,089	167,465	166,660
Change in fair value of contingent consideration	51	(86)	(21)	(6,941)
Bad debt expense	9,321	26,082	32,832	41,045
Impairment of goodwill	13,850	0	251,850	0
Acquisition and integration expenses	274	2,922	753	14,754
Restructuring and other expenses	4,043	1,846	12,309	10,296
Amortization of intangibles	1,286	1,620	4,265	4,943
Loss from continuing operations	(19,283)	(27,707)	(281,230)	(48,898)
Interest expense, net	9,507	9,567	27,750	29,203
Loss from continuing operations before income taxes	(28,790)	(37,274)	(308,980)	(78,101)
Income tax expense (benefit)	(4,551)	1,930	(22,544)	8,484
Loss from continuing operations, net of income taxes	(24,239)	(39,204)	(286,436)	(86,585)
Income from discontinued operations, net of income taxes	7,457	494	5,172	2,743
Net loss	(16,782)	(38,710)	(281,264)	(83,842)
Accrued dividends on preferred stock	(1,899)	0	(4,157)	0
Deemed dividends on preferred stock	(169)	0	(3,519)	0
Loss attributable to common stockholders	$ (18,850)	$ (38,710)	$ (288,940)	$ (83,842)
Loss per common share:
Loss from continuing operations, basic and diluted (in dollars per share)	$ (0.38)	$ (0.57)	$ (4.28)	$ (1.27)
Income from discontinued operations, basic and diluted (in dollars per share)	0.11	0.01	0.08	0.04
Loss per common share, basic and diluted (in dollars per share)	$ (0.27)	$ (0.56)	$ (4.20)	$ (1.23)
Weighted average common shares outstanding
Weighted average number of common shares outstanding (in shares)	68,742	68,615	68,693	68,421